import java.util.Scanner;

public class Homework3 {
    public static void main(String[] args) {
        Scanner a = new Scanner(System.in);
        System.out.println("输入一个数");
        int num = a.nextInt();
        if (num % 7 == 0) {
            System.out.println("是7的倍数" );
        }else {
            System.out.println("不是7的倍数" );
        }
    }
}